基于数值优化方法的Halbach磁体无源匀场方法研究
李正喆, 郭亮, 任旭虎

A Passive Shimming Method for Halbach Magnet Based on Numerical Optimization Algorithm
LI Zhengzhe, GUO Liang, REN Xuhu
图7 迭代过程中梯度范数变化图
Fig. 7 Changes of the gradient norm during the iterative process